Three-fifths of a certain number is equivalent to 70% of another number. What is the ratio of the first number to the second number?
7 : 6
Let the two numbers be A and B. The condition is (3/5)A = (70/100)B = (7/10)B.
So A/B = (7/10) ÷ (3/5) = (7/10) × (5/3) = 35/30 = 7/6.
Hence, A : B = 7 : 6.
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